Safariland used to have a piece made of spring steel for all sorts of magazines (I still have some for the 1911 mags).
But I haven't seen any in a long time.
"A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed."
Life Member NRA
Life Member NAHC
Former President of the ECPT (Eifel Combat Pistol Team)